Cultivator disk gang operator



Oct. 22, 1940.

H. H. BUHR Re. 21,601

- CULTIVATOR DISK GANG OPERATOR Original Filed June .30, 1938 if Sheets-Sheet 1 Inventor A ttorncya Oct. 22, 1940. H. H. BUHR CULTIVATOR DISK GA NG OPERATOR Original Filed June 30, 1938 3 Sheets-Sheet 5 Inventor H /7. #Ba/ifl Attorneys i I Reissued Oct. 22, 1940 CULTIVATOR DISK GANG OPERATOR Harry B. Buhr, Sumner, Iowa,-assignor of onehalf to Fred Buhr, Sumner, Iowa Original No. 2,152,134, dated March 28, 1939, Se-

rial No. 216,791, June 30, 1938. Application for reissue June 8, 1940, Serial No. 339,580

. 23 Claims.

This invention appertains to new and useful improvements in agricultural implements and particularly to a control for disk harrows.

The principal object of the present invention 5 is tov provide a control whereby a disk harrow can have its disks angled automatically when connected with a tractor.

Another important object of the invention is to provide a disk harrow constructed in such a 19 manner that it can be employed in conjunction with the usual power take off of a tractor to the end that the operator can control the disks without getting 011' of the tractor.

A further object is the association of-a harrow with a tractor in such a way that the position of a gang of the harrow with respect to another part of the harrow may be changed by means of power derived from the power plant of thetractor.

m Another object is the association of an implement with a tractor in such a way that the position of one part of the implement with respect to another part thereof may be adjusted by means of power derived from the power plant of the tractor.

Still another object is the association of a-harrow with a tractor in such a way that the position of gangs of the harrow with respect to the frame of the harrow may be adjusted by means of power a derived from the power plant of the tractor.

A still further object is the association of a harrow with a tractor in such a way that the position of one harrow gang with respect to another harrow gang may be adjusted by means of power 35 derived from the power plant of the tractor. v

Ano er object is the provision of means for an implement pivotally connected in trail-behind relationship with a tractor for adjusting one part of an implement with respect to another part These and various other important objects and advantages of the invention will become apparent to the reader of the following specification.

In the drawings: Figure 1 represents a side elevational view of secured tothe shaft 3|.

the harrow showing the control means partly in section.

Figure 2 is a sectional view taken substantially on the line 22 of Figure 1.

Figure 3 is a perspective view of the yoke shown in Figure 2.

Figure 4 is a perspective view of the tension bar.

Figure 5 is a top plan view of the connecting assembly.

Figure 6 is a side elevational view of the connecting assembly.

Figure 7 is a cross sectional view on the l1 of Figure 6.

Referring tothe drawings wherein like numerals designate like parts, it can be seen that numeral 5 generally refers to the harrow which line , consists of the platform 8 from which rises the spring I supporting the seat 8. A sleeve 9 at its forward end has the pin Ill disposed therethrough and'through the yoke II at the rear end of the draft tongue I! which is pivotally secured as at II to the draw-bar ll of the tractor generally referred toby numeral IS. The harrow is connected at the rear of the tractor in trail-behind relationship thereto.

The frame l6 carries the gangs of disks I1, and is pivotally secured as at I! to the platform 6. Numeral l9 represents the usual lever for operating the connecting rods 20 which are connected to the shafts 2| of the disk gangs pivotally as at 22. A quadrant rack 23 is secured to the platform 6 and against this is operative the detent 24. Thus by shifting the lever IS, the angle of the disk gangs can be changed, but in this connection the operator must be on the platform 8 whereas in carrying out the present invention, the operator may be seated on the tractor II.

In carrying out the present invention, the usual power take-off adapter 25 is employed. On this is mounted the disk 26 having the eccentric pin 21 disposed through the forward end of the connecting rod 28. The rear end of the rod 28 is pivotally secured as at' 29 to the lower end of the arm 30 which depends from the shaft II. This shaft ll-is journaled throughbearings 32 on the draw-bar ll. Numeral 33 represents a U-shaped yoke having the upper'ends of its legs The lower bight portion of this yoke or crank 33 is provided with a pair of depending ears 34-34 apertured as at l! and through these ears is disposed the bolt II for pivotally securing the adjacent twisted end of the bar section 31 thereto. Connecting straps 38 pivotally connect the rear end of this section :1 to the adjacent end of the tension bar a. The

'U-shaped yoke 43 and also through the lug which is secured suitably to the forward end of the tension bar It.

A cross piece 45 on the yoke 43 supports a pair of rollers 46 on its lower side, these rollers being grooved to receive the longitudinal edge portions of the tension bar 39.

A nut is provided on the forward end of the rod II and cushioning springs 41 are provided on this rod at the opposite sides of the bight portion 42 of the yoke 43.

' The rear ends of the legs of the yoke 43 are apertured to receive the aforementioned pin 22 at which point the lever I9 is connected with the disk gang operating frame 20.

It will be seen that .the parts just described comprise a control means between the crank or yoke 33 and the harrow gangs, which means is divided into a pair ofsections with shock-absorbing means between the sections. The yoke 43 may be considered to constitute one section and the bar section 31, links II, and tension bars ll the other section. The springs 4'! connect the sections resiliently and allow them a limited relative movement in two directions.

Thus it can be seen that the driver of the tractor can readily control the disks I'I by clutching the valve take-oil! means usually found on tractors, this without requiring the stopping of the tractor and actuation of the hand bar I! and this without requiring a second man on the harrow. when the eccentric pin 21 on the disk 2 is to the right of the adapter 25 as shown in Figure 1, the connecting rod 2! is at its forward position, and the gangs also are in their forward position. When the pin 21 is in a position generally diametrically opposed to that ofFlgure 1, the connecting rod 28 is in its rearward poution and likewise the gangs. Change from one position to the other is accomplished by a half revolution of the disk 28. Thus the power takeoff adapter is operative to move the gangs either forward or rearward by power. It is to be understood, of course, that, when the gangs are under control of the power take-off adapter, the detent 2| will be continuously held out of engagement with the quadrant rack 23 so that shifting of the gangs may take place.

The pivotal connection of the bar section 31 with the tension bar 39 by means of the straps 38 provides a flexible portion in the connection between the crank or yoke 33 and the gangs of disks I! generally adjacent the pivotal connection II of the draft tongue i 2 with the draw-bar ll of the tractor. Thus, as the tractor pivots with respect to the harrow about the connection I! as in turning of the harrow, the links 3! allow the necessary pivoting of the tension bar ll with respect to the bar section 21.

ItwillbeseenfromFigure2thatthepower take-oil. adapter is at the side of the tractor and the bar section I! is laterally displaced from the adapter a considerable amoimt, extending from the yoke or crank 23' back to the gangs substantially on the centerline of the .tractor and directly beneath the connection I! and the draft tongue I! connecting the tractor and the harrow. The taking of power from one point on the harrow and transmitting it to the harrow on a line displaced laterally of the tractor is made possible and the harrow extends for the most part at substantially the level of the shafts 2| of the harrow gangs. The connecting rod 28 between the adapter and the arm ill on the rockable means extends beneath the axle of the tractor and is consequently well out of the way of a tractor seat which might, for example, be over the.

axle.

The power take-oil adapter 25 and the disk 26 constitute in a broad sense an outlet for the power plant of the tractor It.

It is to be noted that the connecting rod 2!, arm 30, and yoke or crank 33 may be considered to constitute means on the tractor which have a longitudinal movement with respect to the tractor for shifting the gangs. More broadly they are means shiftable with respect to the tractor in contrast with a regular rotating power-takeofl' shaft extending from the tractor to the harrow.

,While the foregoing specification sets forth the invention in specific terms, it is to be understood thatnumerous changes in the shape, size and materials may be resorted to without departing from the spirit and scope of the invention as claimed hereinafter.

Having described the invention, what is claimed is:

1. In combination, a tractor having a power plant, a harrow including a gang connected at the rear of the tractor, and means connecting the power plant and the harrow for adjusting the gang and including a member mounted entirely on the tractor and being shiftable with respect thereto during flow of power from the power plant to the harrow.

2. In combination, a tractor having a power plant, a harrow including a gang and connected atthe rear of the tractor, and means connecting the power plant and the harrow for adjusting the angle of the gang and including a member mounted entirely on;the tractor and having a movement longitudinalof the tractor during flow of power from the power plant to the harrow.

3. In combination, a tractor having a rear axle and a power plant, a harrow connected at the rear of the tractor and including .a gang, and a connection extending beneath the rear axle of the tractor between the power plant and the harrow for adjusting the gang.

4. In combination, a tractor having a power plant, a harrow connected at the rear thereof and including a gang, and means connecting the power plant and the harrow for adjusting the gang through shitting movement of the means with respect to the tractor and having a portion retained generally adjacent the connection of the harrow and the tractor.

5. In combination, a tractor having a rear axle and a. power plant, a harrow connected 'at the rear thereof and including a gang, rockable means mounted on the tractor on a transverse axis, means passing beneath the rear axle of the tractor and connecting the power plant and the rockable means, and means connecting the gang and a point of the rockable means at the level of the gang.

6. In combination, a tractor having a power plant, a harrow positioned at the rear thereof and including a frame and a gang beneath the frame, draft means connecting the harrow frame 7. In combination, a tractor having a power plant, a harrow including a gang connected at the rear of the tractor, and means connecting the power plant and the harrow gang for adjusting the angle of the same and including a member mounted on the tractor and being shiftable with respect thereto and shock-absorbing means connecting the shiftable member and the harrow gang.

8. In combination, a tractor, a harrow includ ing agang connected at the rear of the tractor, and means connecting the tractor and the harrow gang for adjusting the angle of the same and including a member mounted on the tractor and being shiftable ,with respect thereto and shockabsorbing means connecting the shiftable member and the harrow gang.

9. In combination, a tractor, a harrow including a gang connected at the rear of the tractor, and means connecting the tractor and the harrow gang for adjusting the angle of the same and including a member mounted on the tractor and being shiftable with respect thereto and a connection between the shiftable member and the gang including members resiliently connected to one another forlimited relative movement in two directions.

10. In combination, a tractor, an implement connected at the rear thereof and having an adjustable part, and means connecting the tractor and the implement for adjusting the adjustable part thereof and including a member mounted on the tractor and shiftable with respect thereto and a connection between the shiftable member and the implement .and including members resiliently connected to one another for limited relative movement in two directions.

11. In combination with a tractor having a power take-oil, an agricultural machine includin ground-engaging elements, means for changing the angle of the elements, said means including a shaft on the tractor, a crank on the shaft, control means from the crank to the ground-engaging elements, an arm on the shaft, and a connection between the arm and the power take-ofl.

12. In combination with. a tractor having a power take-off, an agricultural machine including ground-engaging elements, means for changing the angle of the elements,-said means including a shaft on the tractor, a. crank' on the shaft, control means from the crank to the groundengaging elements, an arm on the shaft, and a connection between the arm and the power takeoff, a drive disk for the power take-oihsald lastmentioned connection being eccentrically connected to the said disk.

13. In combination with a tractor having a power take-oil, an agricultural machine including ground-engaging elements, means for changing the angle of the elements, said means including a shaft on the tractor, a crank on the shaft, control means from the crank to the ground-engaging elements, an arm on the shaft, and a connection between the arm and the power take-ofi, said control means from the crank to the ground-engaging elements being divided into a pair of sections and shock-absorbing means between the said sections.

14. In combination, a tractor having a rear axle and a power plant, a harrow including a gang connected at the rear of the tractor, and means connecting the power plant and the harrow for adjusting the gang and including a member mounted on the tractor and extending ahead of the rear axle and being shiftable with respect thereto during flow of power from the power plant to the harrow.

15. In combination, a tractor having a rear axle and a power plant, a harrow including a gang andconnected at the rear of the tractor, and means connecting the power plant and the harrow for adjusting the angle of the gang and including a member mounted on the tractor and extending ahead of the rear axle and having a movement longitudinal of the tractor during flow of power from the power plant to the harrow,

16. In combination, a tractor having a rear axle and a power plant outlet in front of the rear axle, a harrow connected at the rear of the tractor and having a gang, and means connecting. the power plant outlet and the harrow for adjusting the gang and including a member passing beneath the rear axle of the tractor and being shiftable with respect to the tractor.

1'7. In combination, a tractor having a. rear axle and a power plant outlet in front of the rear axle, a harrow connected at the rear of the tractor and having a gang, and means connecting the power plant outlet and the harrow for adjusting the gang and including a member passing beneath the rear axle of the tractor and being shiftable with respect to the tractor, the member passing beneath the rear axle of the tractor having a longitudinal movement with respect to the tractor.

18. In combination, a tractor havinga rear axle and a power plant outlet in front of the rear axle, a, harrow connected at the rear of the tractor and having a gang, and means extending beneath the rear axle of the tractor and between the power plant outlet and the. harrow for adjusting the gang by a shifting movement with respect to the tractor and having a portion retained generally adjacent the connection of the implement and the tractor.

19. In combination, a tractor having a rear axle and a power plant outlet in front of the rear axle, a harrow pivotally connected at the rear of the tractor and having a gang, and means extending beneath the rear axle of the tractor and between the power plant outlet and the harrow for adjusting the gang thereof by a lon-' gitudinal movement of the means with respect to the tractor and being supported adjacent the connection of the implement and the tractor and having a flexible portion adjacent the said connection.

20. In combination, a tractor having a rear axle, a body, and a power plant having an outlet at one side of the body, a harrow having a gang and connected at the rear of the tractor at a point displaced laterally from the powerplant outlet, and means for adjusting the harrow gang comprising rockable means mounted on the tractor, means connecting the power-plant out generally in alinement with the connection of the tractor and the implement longitudinally of the tractor and passing beneath the rear axle of the tractor.

21. In combination, a tractor having a body and a power plant having an outlet at one side of the body, a narrow having a gang and connected at the rear of the tractor at a point displaced laterally from the power-plant outlet, and means for adiusting the harrow gang comprising rockable means mounted on the tractor on a transverse axis,' means connecting the powerplant outlet and a point on the roclgable means generally in alinement with the power-plant outlet longitudinally of the tractor and beneath the said transverse axis of the rockable means, and means connecting the implement and a point on the rockable means generally in alinement with the connection 01' the tractor and the implement longitudinally of the tractor and beneath the said transverse axis of the rockable means.

22. In combination, a tractor having a rear axle and a power-plant outlet in front of the rear axle, a self-supported implement connected at the rear of the tractor in trail-behind relationship thereto andcomprising relatively ad 23.,In combination, a tractor having a rear' axle and a power-plant outlet in front of the rear axle, a self-supported implement connected at the rear oi the tractor in trail-behind relationship thereto and comprising relatively adjustable parts, and a connection extending beneath the rear axle between the power-plant outlet and the implement for adjusting one part thereof with respect to another by a shifting movement with respect to the tractor and having a portion retained generally adjacent the connection of the implement and the tractor.

HARRY H. BUHR. 

